Linear Guide Rail Set, 1200mm, 2 Rails, 4 Blocks

Linear guide rail set for CNC delivers smooth, accurate motion to reduce chatter and binding in automation builds. This kit includes two 1200 mm supported rails with four slide blocks, combining a rigid aluminum base with a precision steel shaft for stable travel under load. Designed for repeatable positioning, low-friction movement, and straightforward alignment, it’s a reliable choice for CNC router tables, 3D printers, laser engravers, and other DIY linear motion applications.

• Includes 2× 1200 mm (47.2 in) supported SBR20 rails and 4× SBR20UU slide blocks for a complete linear motion setup


• Delivers smooth, low-noise travel with built-in ball bearings to reduce stutter and stick-slip


• Handles load with dynamic rating 882 N per block and static rating 1370 N per block


• Improves accuracy with precision shaft straightness for repeatable motion and stable positioning


• Simplifies installs with pre-spaced mounting holes for fast, secure alignment on machine frames

Built for makers and machine builders who need dependable linear rails and bearings, this supported rail design adds stiffness for longer spans while keeping motion consistent across the full travel length. Use it to upgrade or build CNC routers, milling/lathe sleds, engravers, or other automated equipment where smooth movement and clean alignment matter. Confirm your mounting space and hole spacing before ordering, then grab yours today and keep your next build moving accurately.

• Rail type: Supported round rail SBR20


• Guide rail length: 47.2 in / 1200 mm (each)


• Shaft diameter: 20 mm


• Included blocks: 4× SBR20UU


• Slide block size (L×W×H): 50×48×39 mm (2×1.9×1.5 in)


• Material: High carbon steel & aluminum; chrome-plated surface


• Dynamic load (per block): 882 N


• Static load (per block): 1370 N


• Mounting hole distance A: 35 mm (1.4 in)


• Mounting hole distance B: 35 mm (1.4 in)


• Product dimensions (L×W×H): 1200×90×36.3 mm (47.2×3.5×1.4 in)


• Net weight: 9.2 kg (20.3 lb)